From 4fc243b998e3f7e32d47b21edb1a89526b4b484c Mon Sep 17 00:00:00 2001
From: Adeeb Shihadeh <adeebshihadeh@gmail.com>
Date: Tue, 20 May 2025 10:18:47 -0700
Subject: [PATCH] CI: speed up MISRA mutation job (#2213)

* CI: speed up MISRA mutation job

* install first
---
 .github/workflows/test.yaml  | 4 +++-
 tests/misra/test_mutation.py | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 277cb3c3..da97fd20 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -73,5 +73,7 @@ jobs:
       - run: ./setup.sh
       - name: Build FW
         run: ${{ env.RUN }} "scons -j$(nproc)"
+      - name: tests/misra/install.sh
+        run: ${{ env.RUN }} "cd tests/misra && ./install.sh"
       - name: MISRA mutation tests
-        run: ${{ env.RUN }} "cd tests/misra && pytest -n8 test_mutation.py"
+        run: ${{ env.RUN }} "cd tests/misra && pytest -n2 test_mutation.py"
diff --git a/tests/misra/test_mutation.py b/tests/misra/test_mutation.py
index 8adaa87d..8996d8ae 100755
--- a/tests/misra/test_mutation.py
+++ b/tests/misra/test_mutation.py
@@ -64,6 +64,9 @@ assert len(files) > 70, all(d in files for d in ('board/main.c', 'board/stm32f4/
 for p in patterns:
   mutations.append((random.choice(files), p, True))
 
+# TODO: remove sampling once test_misra.sh is faster
+mutations = random.sample(mutations, 2)
+
 @pytest.mark.parametrize("fn, patch, should_fail", mutations)
 def test_misra_mutation(fn, patch, should_fail):
   with tempfile.TemporaryDirectory() as tmp: